Improvement in furnaces



I waited tatra THOMAS S. vSPEltKlitIAN, OF OAMDEN, NEW JERSEY.

Letters Patent No. 100,205, dated February 2, 1870.

IMPROEMENT IN rURNACEs.

The Schedule referred to in these Letters Patent and making pax-t o! thesame.

To all whom it may concern:

Be' it known that I, THOMAS S. SPEAKMAN, of the city and county lot'Camden, in the State ot" New Jersey, have invented a new and improvedMet-bod of Preventing the Gene-ration of Smoke incident to Gombastion;and I do hereby declare the following to be a full andcorrectdescription of vthe same, sutiicient to enable others skilled inthe class to which my invention appertains to fully understand and applythe same, reference being had to the accompanying drawiulgslwhich makepart ot' this specitication, and in w nc 1- Figure 1 is a sectionalvie-w of a. boiler with which achimney is used with myilnprovelnent'attached, and

Figure 2 is a similar yiew of a boiler uscd without a chimney, alsoprovided with my improvement.

Like letters of reference indicate like parts in both figures., y

My invention consists in the arrangement of a downwardly-bent pipe forthe. exit of the carbonio arid and othell saturated gases, unconnectedwith the fire-place or tbeiim-case. which lattercreatesan artiticialdraught.

A, in the drawings, represents the boiler of an engine resting ou thebed B, the tine C, under the boiler, ending in the chimneyl).

E is the tire-place, under which the ash-pit Fis Situated.

A pipe', G, leads a blast from the fan H to just under the iireplace,the fan being situated in any suitable position, and being operated' bya belt lrom any convenient part ot' the engine.

A'lhe pipe G is provided with a damper", I, to regulate the blast l'romthe fan.

The top ot' thechimney D is provided with a suitable damper, which canbe regulated from below by means ot' a rope, wire, or other suitablemeans. 1n the drawings l have shown a hinged damper, but any well-knownhind of damper will answer the same purpose.

Erom a suitable distance above the boiler a tube, J, extends out anddownward fronrthe chimney .D to a suitable distance from the boiler.

In iig. 21 have shown my improvement applied to an engine in which nochimney is used. Intbis case the iiue C extends into a tube, K, whichlatter is bent upward and downward, as shown in the drawings.

I surround this tube K by a barrel, L, iu which the tube K may be placedin close coils, it' desirable,iits end extending through the end ot` thebarrel.

rlhis barrel is to be iilled with water, which will be heated to acertain degree by the tube K, and may be used as feed-water for theboiler, saving fuel, as it is already heated. A

The operation of my device is as follows:

1n starting the fire a few t-urus by hand. ofthefan `Will make a goedVfue in one-halt' the time it could be done without it. 'lhc damper onchimneyD is of course opened until the fire is strong enough to createsteam in the boiler, and the engine has been started, from which timethe fan is operated automatically. I prefer to provide the fan-shaftwith a fast and a loose pulley, so as to enable me, by'shitting the.belt, to stop the fan entirely, should this become necessary ordesirable. As soon as steam 'is created and the engine in operation thedamper is closed, and a back pressure upon the draught is its immediatereresult. Were there no exit for the carboniol acid thisback*pressurewould at once put out thettire, but tlhs is obviated by thetube J, which affords au egress for the carbonio acid, while the blastfrom the fan keeps up the draught. rlhe back pressure in the chimney audline must be of just sutiicient force to keep the products ot'combustion over the fire until all but the carbonio acid has beenconsumed, which, when freed, easily iinds its way out through the. tubeJ. force of the. back pressure is regulated by regulating thedraughtcreated by the blast from Athe fan.

This is easily and promptly effected by means of'` the damper I in theblast-pipe G. v The same resultis effected in the device shown in iig.2. In this'case the back pressure upon the draught is produced by thedownward bends of tube K, the carbouic acid escaping through the same,and as it passes through the tube it heats the water in the barrel L,from which the boiler may be fed iu any known automatic or other manner,thus effecting a saving in fuel.

l :unaware that processes for burning fuel under pressure, by means of aforced supply oi' air have been in use before, various Inovisions beingin such cases made for the escape of the carbonio acid and othersaturated gases. I do not, therefore, claim broadly the providing a modeoi' escape for such gases under the conditions named,'as my inventionrelates l to the specific devices which I employ to this end.

Having thus described my invention,

What I claim as new, and desire to secure by lLetters Patent, is-

1.,'lhe arrangement of the pipe J, bent downwardly, on the chimney` D ofa furnace, substantially as and-for the purposes set forth.

2. The combination of the tube K (iig. 2) with the ue C and barrel L,substantially as and for the purpose set forth.

3. The combination of the fan H, bent pipe J, and the damper ou the topot' the chimney I), when arranged to operate substantially as and forthe purposes herein set forth.

.lhc above specification of my improved method of preventing thegeneration of smoke incident to combustion signed this 13th day ot' Novcmber, 1809.

Witnesses: THOMAS S. SPEAKMAN.

HENRY J. ARETZ, l Henny A. JOHNSTON.

The

